Improvement in pitman-holders for harvesting-machines



m; nosi snoox. Pitman-Holders 'fu'r flarva'sting ldachines. N-a.157,637.

Patentgd Dec. 8,187 4.

lzwezziar Witnesses Ja /MM UNITED STATES PATENT OFFICE.

JOHN M. ROSEBROOK, OF HOOSIGK FALLS, NEW YORK, ASSIGNOR TO WALTER A. WOOD MOl/VING AND REAPING MACHINE COMPANY, OF SAME PLACE.

IMPROVEMENT IN PITMAN-HQLDEZRS FOR HARVESTING-MACHINES.

Specification forming part of Letters Patent No. 157,637, dated Decrmber 8, 1874 application filed October 28, 1874.

To all whom it may concern:

Be it known that I, JOHN M. RosEBRooK, of Hoosick Falls, county of Rensselaer, State of New York, have invented certain new and useful Improvements in PitmanHolder for Harvesting-Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, making part of this specification, in which- Figure is a plan or top view of the inner or heel end of the cutting apparatus of a harvesting-machine, showing my improvement. Fig. 2 is a vertical section through the same, taken on the grain side of the shoe. Fig. 3is a rear elevation. Fig. 4 represents a section on the line y 3 Fig. 3; and Fig. 5 shows a modification in the form of the locking device.

Similar letters of reference denote corresponding parts wherever used.

The invention relates to a novel device for holding the pitman connected with the sicklebar head when the machine is in operation, while permitting the same to be readily detached for removal or repairs of the parts when the machine is at rest; and consists in the combination, with the bent end or pin on the pitman which engages with the sickle-bar head, of a pivotal latch or plate arranged behind said pin and covering the entire extent of its throw, and held in place by a pivoted locking-dog, as hereinafter set forth, the detachable nuts or pins common for fastening the pitman to the sickle-head being dispensed with, and, at the same time, the accidental displacement of the pitman effectually prevented, as will be explained.

In the accompanying drawing, D represents the finger-bar, E the sickle-bar, and F the inner shoe or heel-plate, to which the inner or heel end of the finger-bar is bolted, these parts being of any usual or preferred construction. 0 represents the clip which holds the heel end of the sickle-bar down upon the finger-bar against the upward thrust of the pitman, due to the elevated position of its driving-crank. This clip is fastened to the heel end of the finger-bar by a bolt and nut, at c, thesame, by preference, which secure the finger-bar in its socket in the heel-plate F, and at its forward outer end is provided with a standard, 0 from the upper end of which an arm extends inward, overhanging the path of the sickle head or eye E, and in close proximity thereto, in such manner as 'to receive the upward thrust of the sickle-head or pitman referred to, thereby removing it from the lighter and more flexible sickle-bar. To the rear face of this clip-standard G a weighted latch or plate, A, is pivoted near its outer end at a, said latch extending inward and downward, as shown in Fig. 3, and being provided at its inner swinging end with a lip, a, which enters a groove formed betweenvertical lips or flanges 0 on the clip O, which prevent backward and forward thrust of said swinging end. To the outer short end of this plate or latch O a weighted dog, B, is pivoted by its upper end at b, the swinging end of this dog dropping vertically underneath the pivot 11, and resting upon a ledge or shoulder, a formed on the rear face of standard G and which effectually locks the plate A against vertical movement on its pivot a.

For connecting the pitman G with, or disconnecting it from, the sickle-head E, the dog B is swung outward clear of the ledge or shoulder 0 and the plate or latch thrown upward, the parts assuming the position shown in dotted lines, Fig. 3, when the bent end or pin G of the pitman can be readily inserted in the eye of the sicklehead E, or withdrawn therefrom, as desired. When in place, the latch-plate drops down behind the end of the pitman Gr, covering the entire extent of its throw, and is effectually locked in this position by the Weighted dog, which again drops into the vertical position shown in full lines, Fig. 2, resting on the ledge c", as explained. These locking devices described are connected with the stationary clip, and are therefore not affected by the vibrations of the sickle, and

are designed to supersede the detachable or removable pins and nuts in ordinary use for connecting the pitman with the rapidly-vibrating sickle, and which have been found in practice to be one of the most frequentcauses of breakage, and consequent annoying delays, in the use of this class of .machine.

In Fig. 5 is shown a slight modification of the device above described, the pivoted lock- I ing-dog B in this case being pivoted at its lower end to the clip-standard O and its upper swinging end, moved past aline drawn vertically above its pivot, rests by its own gravity under a projecting tongue or spur, A, on the outer end of the latch-plate, thereby effectually locking it in the required position.

The operation of the parts thus constructed will be understood Without further description.

What I claim as new, and desire to secure by'Letters Patent, is-

The vertically-swinging latch or holder A, having the heel-extension beyond its horizontal pivot, as described, in combination with the Weighted dog B, arranged and operating in connection with said heel-extension to lock the holder A in the required position, as described.

JOHN M. ROSEBROOK.

Witnesses:

A. G. EDDY, A. T. SKINNER. 

